//=============================================================================
//     _   _                               ____                _  _          
//    | | | |  __ _  _ __   _ __   _   _  / ___|  _ __   _ __ (_)| |_   ___ 
//    | |_| | / _` || '_ \ | '_ \ | | | | \___ \ | '_ \ | '__|| || __| / _ \
//    |  _  || (_| || |_) || |_) || |_| |  ___) || |_) || |   | || |_ |  __/
//    |_| |_| \__,_|| .__/ | .__/  \__, | |____/ | .__/ |_|   |_| \__| \___|
//                  |_|    |_|     |___/         |_|                         
//
//                     HappySprite - We make sprites happy
//
// Copyright (c) 2007 by Tank Monkey Games
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//=============================================================================

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Xna.Framework;

namespace HappySprite
{
    public static class Trigonometry
    {
        public static float Acos(float f)
        {
            if (-1f < f)
            {
                if (f < 1f)
                    return (float)Math.Acos(f);
                else
                    return 0f;
            }
            else
            {
                return MathHelper.Pi;
            }
        }

        public static float Asin(float f)
        {
            if (-1f < f)
            {
                if (f < 1f)
                    return (float)Math.Asin(f);
                else
                    return MathHelper.PiOver2;
            }
            else
            {
                return -MathHelper.PiOver2;
            }
        }

        public static float Atan2(float y, float x)
        {
            return (float)Math.Atan2(y, x);
        }

        public static float Cos(float angle)
        {
            return (float)Math.Cos(angle);
        }

        public static float Sin(float angle)
        {
            return (float)Math.Sin(angle);
        }

        public static float Tan(float angle)
        {
            return (float)Math.Tan(angle);
        }
    }
}
